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1. Electric current is measured by which of the following?
A. Ammeter
B. Meters
C. Voltmeter
D. None of these
ANSWER:A
SOLUTION :An ammeter is a device used to measure the intensity of electric current in an electrical circuit, which is measured in amperes (A). One ampere is equal to the flow of one coulomb of charge per second.
2. One horse power is equal to how many watt?
A. 748 watts
B. 746 watts
C. 646 watts
D. None of these
ANSWER:B
SOLUTION:one horse power is defined as almost 746 Watt in standard calculations.
3. Kilowatt is a unit to measure which of the following?
A. Power
B. Work
C. Resistance
D. None
ANSWER:A
SOLUTION:A kilowatt (kW) is a unit used to measure power, which is the rate of doing work or the rate of energy flow per unit of time.
4. Kilohertz is a unit which measures?
A. Electromagnetic radio wave frequencies
B. Frequencies
C. Electric resistance
D. None of these
ANSWER:A
SOLUTION:Kilohertz (kHz) is a unit that measures the frequency of electromagnetic radio waves, microwaves, and light.
5. Bar is a unit of which of the following?
A. Energy
B. Work
C. Atmospheric pressure
D. None of these
ANSWER:C
SOLUTION:Atmospheric pressure. Pressure (P): The force per unit area is called pressure. The SI unit of pressure is the pascal (Pa) or N/m2. The metric unit of pressure is the bar.
6. What is the unit for measuring the amplitude of a sound?
A. Coulomb
B. Meters
C. Decibel
D. None of these
ANSWER:C
SOLUTION :The correct answer is In gas and liquid. Convection is the process of heat transfer by the movement of molecules in fluids like gas and liquid.
7. Light year is a unit of __________.
A. Speed of sound
B. Speed of aeroplanes
C. Stellar distances
D. None of these
ANSWER:C
SOLUTION:Stellar distances.
8. One fathom is equal to which of the following?
A. 5 Ampere
B. 6 Meters
C. 6 feet
D. None of these
ANSWER:A
SOLUTION: water has the highest specific heat capacity.
9. Nautical mile is a unit of which of the following?
A. Distance
B. Electric current
C. Weight
D. None of these
ANSWER:A
SOLUTION: A nautical mile is a unit of distance used in air, marine, and space navigation, and for defining territorial waters.
10. Electron Volt is a unit of the following?
A. Energy
B. Work
C. Charge
D. None of these
ANSWER:A
SOLUTION:An electron volt (eV) is a unit of energy. It’s defined as the amount of energy gained by an electron at rest when it’s moved through a potential difference of 1 volt. One electron volt is equal to 1.60 × 10−19 joules.